2017ApJ...836..201D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:57:12

2017ApJ...836..201D - Astrophys. J., 836, 201-201 (2017/February-3)

The sizes and depletions of the dust and gas cavities in the transitional disk J160421.7-213028.

DONG R., VAN DER MAREL N., HASHIMOTO J., CHIANG E., AKIYAMA E., LIU H.B., MUTO T., KNAPP G.R., TSUKAGOSHI T., BROWN J., BRUDERER S., KOYAMATSU S., KUDO T., OHASHI N., RICH E., SATOSHI M., TAKAMI M., WISNIEWSKI J., YANG Y., ZHU Z. and TAMURA M.

Abstract (from CDS):

We report ALMA Cycle 2 observations of 230 GHz (1.3 mm) dust continuum emission, and 12CO, 13CO, and C18O J = 2-1 line emission, from the Upper Scorpius transitional disk [PZ99] J160421.7-213028, with an angular resolution of ∼0′′ / . 25 (35 au). Armed with these data and existing H-band scattered light observations, we measure the size and depth of the disk's central cavity, and the sharpness of its outer edge, in three components: sub-µm-sized "small" dust traced by scattered light, millimeter-sized "big" dust traced by the millimeter continuum, and gas traced by line emission. Both dust populations feature a cavity of radius ∼70 au that is depleted by factors of at least 1000 relative to the dust density just outside. The millimeter continuum data are well explained by a cavity with a sharp edge. Scattered light observations can be fitted with a cavity in small dust that has either a sharp edge at 60 au, or an edge that transitions smoothly over an annular width of 10 au near 60 au. In gas, the data are consistent with a cavity that is smaller, about 15 au in radius, and whose surface density at 15 au is 10^3±1^ times smaller than the surface density at 70 au; the gas density grades smoothly between these two radii. The CO isotopologue observations rule out a sharp drop in gas surface density at 30 au or a double-drop model, as found by previous modeling. Future observations are needed to assess the nature of these gas and dust cavities (e.g., whether they are opened by multiple as-yet-unseen planets or photoevaporation).

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): circumstellar matter - planets and satellites: formation - protoplanetary disks - stars: individual: [PZ99] J160421.7-213028 - stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be - stars: variables: T Tauri, Herbig Ae/Be

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1553 1
2 QSO B1514-24 BLL 15 17 41.8135246339 -24 22 19.482167214   15.13 14.00 13.95   ~ 652 3
3 QSO J1559-2442 QSO 15 59 41.40907451 -24 42 38.8320005   19.33 19.0 18.7   ~ 63 1
4 2MASS J16042165-2130284 pr* 16 04 21.6546714640 -21 30 28.549578725   13.3       K2 94 0
5 NAME Upper Sco Association As* 16 12 -23.4           ~ 1053 1

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:57:12

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